With airlines phasing the 727 out in favor of those newer, more efficient planes, Boeing had little reason to keep the 727 around. Read more: 12 Smart Gadgets You Didn't Know Existed Despite the ...

DALLAS — Today, in 1964, the three-engined Boeing 727 entered service with launch customer Eastern Air Lines (EA), one of the "Big Four" domestic airlines created by the Spoils Conferences of 1930.